libstdc++-v3/testsuite/27_io/basic_istream/extractors_arithmetic/char/12.cc

   1 // 1999-04-12 bkoz
   2
   3 // Copyright (C) 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 27.6.1.2.2 arithmetic extractors
  22
  23 // XXX This test fails on sparc-solaris2 because of a bug in libc
  24 // XXX sscanf for very long input.  See:
  25 // XXX http://gcc.gnu.org/ml/gcc/2002-12/msg01422.html
  26 // { dg-do run { xfail sparc*-*-solaris2* } }
  27
  28 #include <istream>
  29 #include <sstream>
  30 #include <testsuite_hooks.h>
  31
  32 std::string str_01;
  33 std::string str_02("true false 0 1 110001");
  34 std::string str_03("-19999999 777777 -234234 233 -234 33 1 66300.25 .315 1.5");
  35 std::string str_04("0123");
  36
  37 std::stringbuf isbuf_01(std::ios_base::in);
  38 std::stringbuf isbuf_02(str_02, std::ios_base::in);
  39 std::stringbuf isbuf_03(str_03, std::ios_base::in);
  40 std::stringbuf isbuf_04(str_04, std::ios_base::in);
  41
  42 std::istream is_01(NULL);
  43 std::istream is_02(&isbuf_02);
  44 std::istream is_03(&isbuf_03);
  45 std::istream is_04(&isbuf_04);
  46 std::stringstream ss_01(str_01);
  47
  48 // libstdc++/3720
  49 // excess input should not cause a core dump
  50 template<typename T>
  51 bool test12_aux(bool integer_type)
  52 {
  53   bool test __attribute__((unused)) = true;
  54
  55   int digits_overflow;
  56   if (integer_type)
  57     // This many digits will overflow integer types in base 10.
  58     digits_overflow = std::numeric_limits<T>::digits10 + 2;
  59   else
  60     // This might do it, unsure.
  61     digits_overflow = std::numeric_limits<T>::max_exponent10 + 1;
  62
  63   std::string st;
  64   std::string part = "1234567890123456789012345678901234567890";
  65   for (std::size_t i = 0; i < digits_overflow / part.size() + 1; ++i)
  66     st += part;
  67   std::stringbuf sb(st);
  68   std::istream is(&sb);
  69   T t;
  70   is >> t;
  71   VERIFY(is.fail());
  72   return test;
  73 }
  74
  75 bool test12()
  76 {
  77   bool test __attribute__((unused)) = true;
  78   VERIFY(test12_aux<short>(true));
  79   VERIFY(test12_aux<int>(true));
  80   VERIFY(test12_aux<long>(true));
  81   VERIFY(test12_aux<float>(false));
  82   VERIFY(test12_aux<double>(false));
  83   VERIFY(test12_aux<long double>(false));
  84   return test;
  85 }
  86
  87 int main()
  88 {
  89   test12();
  90   return 0;
  91 }